CZ429598A3 - Soap for personal hygiene - Google Patents

Abstract

A composition for a soap bar comprises: (i) from about 0.5 % to about 5 %, by weight, of silicone; (ii) from about 0.5 % to about 5 %, by weight, of a first emollient selected from polyols, selected from glycerin, sorbitol, or mixtures thereof; (iii) up to about 5 %, by weight, of a second emollient selected from vegatable, animal or mineral oils, or free fatty acids, or mixtures thereof.

Description

Technical field

The invention relates to personal care soap with an exceptionally low irritability.

BACKGROUND OF THE INVENTION

A general problem in the production of soap for personal hygiene is to try to balance its properties in terms of sufficient foaming and at the same time the least irritability, and the resulting soap should be relatively inexpensive.

Soap making is well documented in the literature.

WO 92/0844 discloses a soap in the form of soap bars containing 0.5 to 20% silicone rubber / liquid silicone. Polyalkyl siloxanes are particularly preferred. These soaps have a moisturizing effect, are non-irritating and prevent the skin from drying out. Optional ingredients include fatty acids such as plasticizers, glycerol and moisturizers, especially vegetable oils.

EP 578 841 discloses a solid soap containing 0.5 to 7% water-insoluble silicone of the formula

R.

_R - (Si0) _n -R ₄

R, and optional other ingredients, for example glycerol. It is stated that

ΒΒΒ ΒΒ Β ΒΒΒ ·

Β Β ΒΒΒ ΒΒΒΒ

ΒΒ Β ΒΒ · · ······

ΒΒ ΒΒΒΒ Β Β

ΒΒ ΒΒΒΒ ΒΒ ΒΒ ΒΒ Β

Nový · · snižuje nový nový nový nový snižuje nový Β Β nový Β nový Β Β nový nový Β Β snižuje Β snižuje Β snižuje snižuje snižuje snižuje snižuje snižuje snižuje snižuje snižuje snižuje snižuje

GB 2 058 822 describes a soap containing 0.01 to 6% polydiorganosiloxane with a molecular weight of 2000 or more and containing nitrogen, the soap improves the skin feel after use.

GB 2,143,250 relates to a combination of vegetable oil and silicone oil for use in skin cleansing compositions.

International Patent Application WO 94/17172 (Unilever) discloses a syndet-based soap bar comprising 0.1 to 9% silicone, 0 to 25% soap and 0 to 35% free fatty acids.

JP 01294797 describes mixtures of silicone oils and optionally polyols, for example glycerol, for use in counter-ion-based soaps based on weak bases.

JP 01060696 describes mixtures of silicone oils and optionally polyols, for example glycerol, for use in transparent soaps.

However, due to the properties of the wetting agents present in conventional toilet soaps that can provide very effective skin cleansing, it is likely that the skin will remain unprotected immediately after washing, which causes a feeling of dryness and overall skin tension.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome these drawbacks and to propose a new soap composition which can provide irritability.

9 9 9 9

9 9 9

9 9 9 9 9 9

SUMMARY OF THE INVENTION

It has now been unexpectedly found that, when silicones and other emollients are mixed, the obtained toilet soaps may have other beneficial effects on the skin in addition to good cleansing properties. It is especially a pleasant feeling of dry and silky skin.

These results were verified by descriptions of the volunteer group.

Among the properties of silicones applicable to the skin, the following properties are particularly important: it is a hydrophobic substance which is resistant to the action of water and remains on the skin even after rinsing; pleasant feeling on the skin.

These properties are optimized when the silicone is combined with other plasticizers. This is done by adsorbing other plasticizers to the silicone molecule.

In addition, it has been shown that the soap containing said mixture of silicone and other emollients forms a more creamy and dense foam compared to the foam formed by known toilet soaps.

Accordingly, the present invention provides a personal soap based on conventional soap containing 65 to 85% by weight of fatty acids and 1 to 15% by weight of a combination of silicones and other emollients. When used on a dry skin type, soap of this type provides a feeling of soft, silky skin to a much greater extent than known soaps.

4 ·· * ·

C · 9 9 4 9 9 9 9

9 99 9 99 999999

4 9 9 9 9 9

999 9999 99 99 49

Various types of silicones may be used in the soaps of the invention, for example linear, cyclic or substituted silicones and mixtures thereof.

Emollients suitable for use in the soaps of the present invention may be selected from polyols, fatty acids, vegetable, mineral and animal oils and other similar emollients that may be adsorbed onto the silicone chain.

Of the polyols, glycerol and sorbitol are preferred.

Among the free fatty acids, fatty acids from the palm of babassu and lauric acid are preferred.

Among the vegetable oils, for example, sunflower oil, corn oil and almond oil may be used.

The toilet soap according to the invention may also contain a proportion of the respective perfume which is added to the soap composition during manufacture.

It is also possible to add a certain amount of colorant to the soap composition for personal hygiene according to the invention to produce the desired color of the soap bars.

The amount of perfume and colorant added to the soap making composition of the present invention is not critical and should be such that the desired color of the resulting soap and the desired flavor effect is achieved.

The composition of the novel soap according to the invention will be further described by way of example, but is not intended to limit the scope of the invention.

ΦΦ ΦΦΦΦ · v v v v v v v v φ φ φ φ φ φ · · · · · · ♦

DETAILED DESCRIPTION OF THE INVENTION

In this example, the soap is prepared by cold rolling.

The sanitary soap composition, composed of 65-85% by weight of fatty acid salts, is placed in a mixer (e.g. Sigma). Glycerol and / or polyols, silicone and other plasticizers are added in an amount of 1 to 15% by weight. The water content of the mixture is then adjusted to a value of 8 to 20% by weight.

Finally, the desired amount of dye (e.g., Red Iragon PS and / or Orange Iragon II DC) is added along with an appropriate amount of a soap-compatible perfume, such as Gemini 699.

During the addition, the mixture is thoroughly mixed using a suitable mixer. Once a homogeneous mixture is obtained, the mixture is processed in the conventional manner to obtain soap or toilet soap in the form of bars by rolling (Buehler / Mazzoni Roller) extrusion using a Bonot extruder, cutting extruded bars, embossing them with punches and packaging (using a Sigma) or Acma).

In this way, soap bars having a composition according to the invention and having the above-defined properties are obtained.

Represented by:

ί '' '' '...

V φ V Φ Φ · φ · · • • '«* φ · ί'. ' 2 ί V Τ - ÍV »». • ·................

AND

Claims (4)

PATENT CLAIMS 1. A personal care soap comprising: (i) 0.5 to 5% by weight of silicone; (ii) 0.5 to 5% by weight of a first polyol type plasticizer selected from the group of glycerol, sorbitol or mixtures thereof; (iii) up to 5% by weight of a second plasticizer from the group of vegetable, animal or mineral oils or free fatty acids or mixtures thereof. Soap according to claim 1, characterized in that the silicone is selected from linear, cyclic or substituted silicones or mixtures thereof. Soap according to claim 1 or 2, characterized in that the free fatty acids are selected from the fatty acids of babassu palm oil or lauric acid. Soap according to any one of claims 1 to 3, characterized in that the vegetable oil is selected from sunflower oil, corn oil, almond oil or a mixture of these oils. Represented by: